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powered subwoofers
MX-700, MX-200, MX-125 Mk II, MX-105 Mk II, MX-70B, VX-100:
Because your M&K MX-series Subwoofer uses an inverted driver that fires down into the floor, it
loads differently to the room than a conventional speaker or forward-firing Subwoofer. This means that
you may want to experiment a bit more with its placement and setup to get optimum sound quality.
1. While your Subwoofer is designed to sit directly on the floor, the distortion cancellation
of its push-pull design and its frequency response are improved when the Subwoofer is slightly
elevated. You may want to try using the enclosed feet to raise the subwoofer off the floor.
2. Read Section 6 (page 11), Use of the LOW PASS FILTER Control, carefully. The setting of this
control is more critical with your MX model Subwoofer. With these models it is more likely that
you will find the optimum setting to be slightly below the 85 Hz recommended for other models.
MX-70B:
The MX-70B gives a very high level of performance in a compact cabinet. Therefore, it is likely
to be installed in both vertical and horizontal locations. To avoid having its inverted driver exposed in
installations where the cabinet is horizontal, the MX-70B has two speaker grills.
If your MX-70B has a solid grille over the inverted driver, leave this grille in place. The
MX-70B is designed so that the sound emanating from this driver comes from the opening in the front
baffle. The solid grille cover insures that this is the case.
MX-700 & VX-100:
The MX-700 and VX-100's pressure-loaded design allows for maximum coupling to a room
because it places its drivers directly adjacent to room surfaces, whether the cabinet is horizontally or
vertically oriented. Feel free to orient the cabinet either way. When vertical, its tall thin look is very
attractive, and gives excellent performance when the subwoofer is in a corner.
The cabinet's 17" width allows the MX-700 to be rack mounted for professional applications or
installations where space is at a premium. If you want to do this, contact M&K for a rack-mounting kit.
11. TROUBLESHOOTING
Your M&K Subwoofer amplifier circuit provides high reliability, and, if necessary, easy modular
replacement of parts. This guide will help you to solve or diagnose most problems that can occur with
your Subwoofer. In the event that a fuse blows, you must replace it with a fuse of the correct value
to avoid a fire hazard and to maintain your warranty protection.
1.
If your Subwoofer has no output:
a.
Make sure that the Subwoofer is plugged into an AC outlet.
b.
Check the "BASS LEVEL" control and make sure that it is set above the
"MIN" position. Rotate it clockwise if it is set to the "MIN" position.
c.
Check the red LED on the Subwoofer's back panel. If the LED is not lit,
check the AC fuse next to the LED. Unplug the Subwoofer before
changing the fuse. See instructions on Page 15. If the element inside the
fuse is broken, replace the fuse. If it blows again, contact your dealer or M&K.
